土壤水分張力自動量測系統率定與應用

Calibration and Application of Automatic Measurement System of Soil Moisture Tension

陳智謀(Zhi-Mou Chen) ； 陳庭堅(Ting-Chien Chen) ； 葉一隆(Yi-Lung Yeh)

《農業工程學報》 53卷2期 (2007/06) Pp. 42-49

https://doi.org/10.29974/JTAE.200706.0005

摘要

本文主要可以分成兩部份，一為土壤水分張力感應器之率定，主要是要瞭解土壤水分張力感應器之訊號處理程式，並以統計方法迴歸土壤水分張力值與土壤水分張力感應器之電壓值的關係。另一方面，本文于休耕水田進行蓄水實驗，以量測蓄水過程之土壤水份張力值變化。由率定試驗結果可得土壤水分張力值與土壤水分張力感應器電壓值之兩個羅吉斯迴歸方程式，此些方程式可精確應用於現地量測試驗之結果。此外，由分析可知土壤水分張力感應器之電壓值的反應區間為1.26~5.05伏特之間。而其適用之土壤水分張力值介於20~199分巴之範圍。

關鍵字

土壤水分張力感應器 ； 土壤水分張力值 ； 電壓 ； 羅吉斯迴歸方程式

並列摘要

This paper included two parts: one is to generate the calibration process of Watermark sensor; the other is to use the sensor to measure soil moisture tension in field test. According to the calibration results, two regression equations were obtained between the soil moisture tension and the voltage of Watermark sensor. These equations were represented by Logistic regression. In addition, these equations were accurately used to express the soil moisture tension in field test. The experiment results showed that the voltage range of Watermark sensor is 1.26 to 5.05 volts and the soil moisture tension is 20 to 199 centibars.

並列關鍵字

Watermark ； Soil moisture tension ； Voltage ； Logistic regression equation